Nemocardium (Keenaea) centifilosum

Not Nemocardium (Keenaea) centifilosum. This is Nemocardium centifilosum (P.P.Carpenter, 1864), a relative — both are Cardiidae.
Dr. Fred Baker · CC BY-NC 4.0 · via GBIF. May be a photograph of a specimen, or an artist’s reconstruction — an interpretation of a skeleton, since colour and soft tissue are almost never preserved.
On record
Recorded, not inferred- Also called
- hundred-line cocklePBDB
- Sits inside
- KeenaeaPBDB
- Diet
- suspension feederPBDB, for Cardiidae
- Life habit
- infaunalPBDB, for Cardiidae
- Motility
- facultatively mobilePBDB, for Cardiidae
- Vision
- blindPBDB, for Bivalvia
Time the record covers
At least 3.4 million years on record.
The record covers at least 3.6 Mya to 129 ka. No occurrence read is dated outside 5.333 Mya to 11.7 ka.
32 occurrences of Nemocardium (Keenaea) centifilosum on record, most of them in the Pleistocene. The Paleobiology Database records this as a living group. Bar height is expected occurrences, not a count: each fossil is spread across the span it is dated to, so a tall narrow bar means tight dating and a low wide one means loose.
When
32 occurrences- Pliocene20%
- Pleistocene80%
These are dates about fossils, not the animal: the record can only begin after it arose and end before it died out, so either end may reach further. Shares are expected occurrences: a fossil dated to a span is counted partly in each period it straddles. More on what this infers.
Found in
9 formations
- Timms Point Silt Formation13
- Lomita Marl Formation4
- Fernando Formation3
- San Pedro Sand Formation2
- Santa Barbara Formation2
- Pico Formation2
Loading coastlines…
The named rock units Nemocardium (Keenaea) centifilosum has been recovered from, largest first. Drawn where the rock is now, not where it formed. 2 occurrences have no formation on record, which is common for older literature.
Nemocardium (Keenaea) centifilosum and its relatives
PleistoceneWhere Nemocardium (Keenaea) centifilosum and its relatives were recorded in the Pleistocene.
Found in the same rock
669 taxa- Caesia perpinguis14 sites
- Cryptonatica affinis14 sites
- Turritella cooperi14 sites
- Mitrella gausapata13 sites
- Chlamys hastata12 sites
- Lucinoma annulata12 sites
- Mitrella tuberosa12 sites
- Patinopecten caurinus12 sites
- Solen sicarius12 sites
- Crockerella conradiana11 sites
- Glossaulax reclusiana11 sites
- Lirobittium rugatum11 sites
- Neptunea (Sulcosipho) tabulata11 sites
- Acteocina culcitella10 sites
- Californiconus californicus10 sites
- Callianax biplicata10 sites
- Calliostoma canaliculatum10 sites
- Coanicardita ventricosa10 sites
- Crepidula princeps10 sites
- Dallocardia quadragenarium10 sites
- Fusitriton oregonensis10 sites
- Hima cooperi10 sites
- Saccella taphria10 sites
- Crepidula nummaria9 sites
The Paleobiology Database records 21 sites for Nemocardium (Keenaea) centifilosum, and this reads all of them. The number is how many of those sites it was catalogued from too. The 24 sharing the most are listed.
This is not a list of everything alive at the time. It is only what has come out of the same ground as this animal and been written down.
Entered from
15 references- The cool-water Timms Point Pleistocene horizon at San Pedro, California11
- The Paleontology and Stratigraphy of the Marine Pliocene and Pleistocene of San Pedro, California4
- On the reconciliation of biostratigraphy and strontium isotope stratigraphy of three southern Californian Plio-Pleistocene formations3
- Paleontology and stratigraphy of some marine Pleistocene deposits in northwest Los Angeles Basin, California2
- Geology and Paleontology of a Portion of Los Angeles, California2
- Early Pliocene marine climate and environment of the eastern Ventura Basin, Southern California1
- Paleoecologic molluscan geography of the Californian Pleistocene1
- The paleontology of the Pleistocene molluscan fauna of the Newport Bay area, California1
- Geology and Paleontology of Palos Verdes Hills, California1
- Geologic Application of Biometrical Analysis of Molluscan Assemblages1
- Geology of the eastern part of the Santa Monica Mountains, Los Angeles County, California1
- The fossils of the Lower San Pedro fauna of the Nob Hill cut, San Pedro, California1
Each of the 32 occurrences read was entered from one of these publications, ordered by how many each accounts for. This is not a search for papers mentioning the name. 3 further references are not listed. Entries link to doi.org where the Paleobiology Database holds an identifier, and to its own record where it does not. Relayed as the Paleobiology Database holds them, not checked against what they resolve to.
Media and terms
Media content1

Picture of Nemocardium centifilosum (P.P.Carpenter, 1864)
- Source
- GBIF
- Credit
- Dr. Fred Baker
- Licence
- CC BY-NC 4.0
- Commercial use
- the licence does not allow it
No 3D scan was found. Smithsonian Open Access, MorphoSource and Sketchfab were all searched.
This is what the site found, which is not the same as what exists.
Keep going
What may have been alongside itKeenaea through timeFormations of the PleistoceneThe world it lived on
Occurrence data from the Paleobiology Database, CC BY 4.0. (Carpenter 1864)